Atmospheric Rivers over the Arctic with the ICON model


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helene.bresson [ at ] awi.de

Abstract

The Arctic climate changes faster than the ones of other regions, but the relative role of the individual feedback mechanisms contributing to Arctic amplification is still unclear. Atmospheric Rivers (ARs) are narrow and transient river-style moisture flows arriving from the sub-polar regions. The integrated water vapour transport associated with ARs can explain up to 70% of the precipitation variance north of 70N. However, there are still uncertainties regarding the specific role and the impact of ARs on the Arctic climate variability. For the first time, the high-resolution ICON modelling framework is used over the Arctic region (from 13 km down to ca. 2 km) to investigate processes related with anomalous moisture transport into the Arctic. Based on a case study for Svalbard, the representation of the atmospheric circulation and the spatio-temporal structure of water vapour, temperature, and precipitation and snowfall within the limited-area mode (LAM) of the ICON model is assessed. The impact on the surface energy budget will be calculated.



Item Type
Conference (Poster)
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Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
The Helmholtz Climate Initiative "Regional Climate Change" (REKLIM) 2nd International Conference "Our Climate - Our Future: Regional Perspectives on a Global Challenge", 23 Sep 2019 - 25 Sep 2019.
Eprint ID
52676
Cite as
Bresson, H. , Rinke, A. , Schemann, V. , Crewell, S. , Viceto, C. and Gorodetskaya, I. (2019): Atmospheric Rivers over the Arctic with the ICON model , The Helmholtz Climate Initiative "Regional Climate Change" (REKLIM) 2nd International Conference "Our Climate - Our Future: Regional Perspectives on a Global Challenge", 23 September 2019 - 25 September 2019 .


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